参数资料
型号: R5F21347EJFP
元件分类: 微控制器/微处理器
英文描述: FLASH, 20 MHz, MICROCONTROLLER, PQFP48
封装: 7 X 7 MM, 0.50 MM PITCH, PLASTIC, LQFP-48
文件页数: 17/48页
文件大小: 536K
代理商: R5F21347EJFP
R8C/34E Group, R8C/34F Group, R8C/34G Group, R8C/34H Group
2. Central Processing Unit (CPU)
REJ03B0246-0010 Rev.0.10
Apr 17, 2008
Page 22 of 44
Under development Preliminary specification
Specifications in this manual are tentative and subject to change.
2.8.7
Interrupt Enable Flag (I)
The I flag enables maskable interrupts.
Interrupt are disabled when the I flag is set to 0, and are enabled when the I flag is set to 1. The I flag is set to 0
when an interrupt request is acknowledged.
2.8.8
Stack Pointer Select Flag (U)
ISP is selected when the U flag is set to 0; USP is selected when the U flag is set to 1.
The U flag is set to 0 when a hardware interrupt request is acknowledged or the INT instruction of software
interrupt numbers 0 to 31 is executed.
2.8.9
Processor Interrupt Priority Level (IPL)
IPL is 3 bits wide and assigns processor interrupt priority levels from level 0 to level 7.
If a requested interrupt has higher priority than IPL, the interrupt is enabled.
2.8.10
Reserved Bit
If necessary, set to 0. When read, the content is undefined.
相关PDF资料
PDF描述
R5F21347EKFP FLASH, 20 MHz, MICROCONTROLLER, PQFP48
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R5F21346EJFP FLASH, 20 MHz, MICROCONTROLLER, PQFP48
R5F21346GJFP FLASH, 20 MHz, MICROCONTROLLER, PQFP48
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